Valve for air-compressors



( Model.)

J. CLAYTON. Valve for Air Compressors.

' No. 241,930. Patented May 24,1881.

n Prrzns. Pholo-Llthoguphur, wan-m. o. c

UNITED STATES PATENT OFFICE.

JAMES CLAYTON, OF BROOKLYN, NEW YORK.

VALVE FOR AlR-COMPRESSORS.

SPECIFICATION forming part of Letters Patent No. 241,930, dated May 24,1881.

Application filed May 31,1880. (N 0 model.)

To all whom it may concern:

Be it known that I, JAMES CLAYTON, of

Brooklyn, in the county of Kings and State of New York, have invented anew and useful Improvement in Valves for Air-Compressors, of which thefollowing is a specification.

In air-compressors the cylinder heads of which are provided withair-inlet valves of disk form mounted on centralstems which arelongitudinally movable in guides in the val veseats accidents are oftenoccasioned by reason of the valves becoming detached through thebreaking of their stems or the unscrewing of the nuts which hold them totheir seats. If so detached, the valve will drop inside the cylinder,and, becomin g jammed between the piston and cylinder-head, will oftencause a serious breakage of the machine.

The object of my invention is to provide a simple and easily-appliedmeans whereby the valve, when so detached from its seat, is preventedfrom dropping into the cylinder and causing breakage. V

To this end my invention consists in the combination, with a disk-likevalve-seat and valve for an air-compressor, of one or more guardboltsrigidly fixed in the valve and working through the seat, but having noother connection with the valve or seat, and provided back or inside ofthe seat with heads or nuts forming shoulders, which, in case of thebreakage of the valve-stem, will strike upon the inside of the seat andprevent the valve from dropping into the cylinder.

In the accompanying drawings, Figure 1 represents a partially-sectionalside view of a suction or inlet valve and seat having my guard-boltsapplied thereto, and representing the valve in a closed position. Fig. 2represents a similar view, showing the valve in an open position; andFig. 3 represents a face view of the seat and a transverse sectionthrough the valve-stem and socket or sleev forming a guide therefor.

Similar letters of reference designate cor responding parts in all thefigures.

A designates a disk-like valve-seat, here shown as movable and adaptedto be screwed into the cylinder-head, although it might be a fixed seat,and A designates a socket or sleeve forming a guide for the stem B, towhich the valve 0 is attached. The valve-seat is constructed with theusual ways or openings, at, and the valve is held in place by a nut, D,fitted to the end of the stem, and forming a stop to the outwardmovement of the valve, as shown in Fig. 2, by striking against the endof the guide A.

E designates the spring for holding the valve against its seat.

All these parts are of common construction, and therefore no furtherdescription thereof is necessary.

It is obvious that it the stem B should break or the stop-n utD becomeunscrewed the valve itself would drop down into the cylinder, where itwould jam between the piston and cylinderhead and cause breakage.

To prevent the valve from so dropping down when it becomes detached, Iprovide one or more guard-bolts, F, of which two are shown in thedrawings having shoulders I), here formed by the heads of the bolts, butwhich might be formed by a collar or nut, the bolts being studboltsinstead of tap-bolts, as here represented. These bolts are insertedthrough holes in the seat A, in which they are fitted so loosely as tomove easily longitudinally therein, and are tightly screwed intoscrew-threaded holes 0 in the valve 0. In order to enable them to bevery tightly secured, I preferably make taper screw-threads upon thebolts and in the holes 0, as clearly shown in Fig. 2.

To provide for readily attaching the guardbolts to the ordinary valves,the bolts are preferably inserted through the ways or openings to in thevalve-seat, in which case all that is necessary to apply them is toprovide the valve with screw-threaded holes 0 for their reception andmake the heads of the bolts larger than the ways or openings.

When the valve is fully open, as shown in Fig. 2, it will be observedthat the shoulders upon the guard-bolts do not strike the seat, and thattherefore an opening is left for the passage of air around the bolts.

It will be observed that the guard-bolts F, which, as before stated, arerigidly attached to orfixed in the valve, have no other connectionwhatever with the valve or seat, and hence may be applied thereto withlittle expense.

By my invention I provide in a simple manner for preventing the droppingof the valves when they become detached from their seats, and myinvention can be readily and quickly applied to valves ofair-compressors now in use, as well as new ones.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination, with the disklike valveseat A and the valve (3, of oneor more guardbolts, F, rigidly attached to the valve andwork- [0 ingthrough the seat, but havingno other connection with the valve or seat,and provided With shoulders I), all substantially as and for the purposespecified.

JAMES CLAYTON. Witnesses FREDK. HAYNES, THOMAS E. BIRCH.

